Cannot push to github, ssh: Could not resolve hostname

Question

I can't get pass this, have remade the repository multiple times, made ssh keys over

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demo_app <username>$ git remote add origin git@github.com:<username>/demo_app.git

fatal: remote origin already exists.

$ git push -u origin master
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ssh: Could not resolve hostname git: nodename nor servname provided, or not known
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fatal: Could not read from remote repository.
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Please make sure you have the correct access rights
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and the repository exists.
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Checked ssh keys

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$ ssh -T git@github.com

Hi <username>! You've successfully authenticated, but GitHub does not provide shell access.

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Still receiving the same message.

Answer 1

Instead of adding a new remote, try to change the existing one with the following command:

git remote set-url origin git@github.com:<username>/demo_app.git

Edit: so, here are the commands to make it work without losing your code.

1. rm -rf .git
2. git init .
3. git remote add origin git@github.com:<username>/demo_app.git
4. git commit --allow-empty -m 'First commit'
5. git push origin master

Answer 2

If you got here because you're on a proxy

Try:

ssh -T -p 443 git@ssh.github.com

If that works then you can add settings to your ~/.ssh/config to always connect through 443:

Host github.com
  Hostname ssh.github.com
  Port 443 

More info here: https://help.github.com/articles/using-ssh-over-the-https-port/

Answer 3

To answer the new error: "error: src refspec master does not match any. error: failed to push some refs to 'git@github.com:/demo_app0.git'

I found this post really helpful: src refspec master does not match any when pushing commits in git

Essentially, try add your files and committing again.

git commit -m 'initial commit' git push origin master

This worked for me!